Delaware Township municipal offices are located at 570 Rosemont-Ringoes Road, Sergeantsville, NJ 08557; phone: 609-397-3240.
The Delaware and Raritan Canal originates near Delaware Township's hamlet of Raven Rock. While the township was established in 1838, one of the oldest settlements dates to ca. 1700 when a man name Thatcher settled in what would become Sergeantsville, named for revolutionary war hero, Charles Sergeant. [www.co.hunterdon.nj.us, accessed June, 2013]